Single-wire programmable MEMS microphone, programming method and system thereof
First Claim
1. A single wire programmable Micro Electromechanical System (MEMS) microphone comprising:
- an MEMS sensor for implementing acoustic-electric conversion;
an Application Specific Integrated Circuit (ASIC) chip, which is connected to the MEMS sensor, the ASIC chip comprises an OUT interface;
the ASIC chip comprises a main circuit module, a one time programmable (OTP)/control circuit module, an interface circuit module, and an OTP memory, an input end of the interface circuit is connected to the OUT interface, one output end of the interface circuit is connected to the main circuit module, and other output end of the interface circuit is connected to the OTP/control circuit module, the OTP/control circuit module is connected to the OTP memory, the interface circuit is used for controlling the main circuit module and the OTP/control circuit module to work in a programmable state or a normal working state according to a voltage of the OUT interface, and the OTP/control circuit module controls the read/write of the OTP memory; and
when output signal of the OUT interface is not strongly driven into a high level, the ASIC chip is started normally, when output signal of the OUT interface is at the high level, the ASIC chip enters a programming mode.
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Accused Products
Abstract
The present invention provides a single wire programmable Micro Electromechanical System (MEMS) microphone and a programming method and system thereof. The single wire programmable MEMS microphone includes an MEMS sensor and an Application Specific Integrated Circuit (ASIC) chip connected to each other; the MEMS sensor is used for implementing acoustic-electric conversion; the ASIC chip includes an OUT interface, so that an upper computer judges, according to an output signal of the OUT interface, whether the ASIC chip is in a normal start mode or a programming mode, where if the output signal of the OUT interface is at a high level, the ASIC chip is in the normal start mode, and otherwise, the ASIC chip enters the programming mode. Through the present invention, multiplexing of the OUT interface of the MEMS microphone is implemented, and gain configuration for the OTP memory in the ASIC chip is implemented by multiplexing the OUT interface, thereby achieving calibration of the gain of the MEMS microphone product after package.
14 Citations
11 Claims
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1. A single wire programmable Micro Electromechanical System (MEMS) microphone comprising:
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an MEMS sensor for implementing acoustic-electric conversion; an Application Specific Integrated Circuit (ASIC) chip, which is connected to the MEMS sensor, the ASIC chip comprises an OUT interface; the ASIC chip comprises a main circuit module, a one time programmable (OTP)/control circuit module, an interface circuit module, and an OTP memory, an input end of the interface circuit is connected to the OUT interface, one output end of the interface circuit is connected to the main circuit module, and other output end of the interface circuit is connected to the OTP/control circuit module, the OTP/control circuit module is connected to the OTP memory, the interface circuit is used for controlling the main circuit module and the OTP/control circuit module to work in a programmable state or a normal working state according to a voltage of the OUT interface, and the OTP/control circuit module controls the read/write of the OTP memory; and when output signal of the OUT interface is not strongly driven into a high level, the ASIC chip is started normally, when output signal of the OUT interface is at the high level, the ASIC chip enters a programming mode. - View Dependent Claims (2, 3, 4)
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5. A programming system for the single wire programmable Micro Electromechanical System (MEMS) microphone comprising:
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an MEMS sensor, used for implementing acoustic-electric conversion; an Application Specific Integrated Circuit (ASIC) chip, which is connected to the MEMS sensor, comprising an OUT interface; the ASIC chip comprises a main circuit module, a one time programmable (OTP)/control module, an interface circuit module, and an OTP memory, an input end of the interface circuit is connected to the OUT interface, one output end of the interface circuit is connected to the main circuit module, and other output end of the interface circuit is connected to the OTP/control circuit module, the OTP/control circuit module is connected to the OTP memory, the interface circuit is used for controlling the main circuit module and the OTP/control circuit module to work in a programmable state or a normal working state according to a voltage of the OUT interface, and the OTP/control circuit module controls the read/write of the OTP memory; and an upper computer connected to the OUT interface and used for reading an output signal of the OUT interface, when the output signal is not strongly driven into a high level, the ASIC chip is started normally;
when the output signal is at the high level, the ASIC chip enters a programming mode, and the upper computer performs a write operation on the ASIC chip that enters the programming mode;the upper computer comprises a two-way interface connected to the OUT interface; and
a read/write control module connected to the two-way interface, wherein the two-way interface is connected to a power supply through a first switch, the two-way interface is grounded throuqh a second switch, and a pull-up resistor is connected between the power supply and the two-way interface. - View Dependent Claims (6, 7, 8)
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9. A programming method for the single wire programmable Micro Electromechanical System (MEMS) microphone comprising:
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step 1;
connecting an Application Specific Integrated Circuit (ASIC) chip to an upper computer, and turning on a power supply;step 2;
the upper computer reading an output signal of an OUT interface of the ASIC chip;
when the output signal is not strongly driven into a high level, the ASIC chip being started normally; and
when the output signal is at the high level, the ASIC chip entering a programming mode; andstep 3;
the upper computer performing a write operation on the ASIC chip that enters the programming mode;wherein the upper computer comprises a two-wav interface connected to the OUT interface and a read/write control module connected the two-way interface;
the two-way interface is connected to the power supply through a first switch, the two-way interface grounded through a second switch, and pull-up resistor is connected between the power supply and the two-way interface;when the first switch is turned off and the second switch is turned on, the two-wav interface weakly pulled down to a low level state; when the first switch is turned on and the second switch is turned off, the two-way interface is strongly pulled up to a high level state; and when the first switch and the second switch are both turned off,the two-way interface is weakly pulled up to a high level state. - View Dependent Claims (10, 11)
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Specification